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MTD
Gas Walk-Behind Mower

Model # 12AVB2R3793 Official MTD gas lawn mower

Here are the diagrams and repair parts for Official MTD 12AVB2R3793 gas lawn mower, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

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Model diagram and schematic

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Showing 10 of 133 parts  |
Troybilt Lawn Mower 21-in Deck Mulching Blade (replaces 01002810, 742-0741a, 942-04276, 942-0741) 942-0741A
#NI03

Lawn mower diagram

Troybilt lawn mower 21-in deck mulching blade (replaces 01002810, 742-0741a, 942-04276, 942-0741)

Part #942-0741A

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Lawn Mower Wheel, 8 X 2-in 634-05040
#NI16

Lawn mower diagram

Lawn mower wheel, 8 x 2-in

Part #634-05040

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Lawn Mower Zone Control Cable (replaces 946-04661) 946-04661A
#NI07

Lawn mower diagram

Lawn mower zone control cable (replaces 946-04661)

Part #946-04661A

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Lawn Mower Rear Skirt 731-07203
#NI15

Lawn mower diagram

Lawn mower rear skirt

Part #731-07203

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Lawn Mower Grass Bag Frame (replaces 647-04271, 747-05226) 647-04271-0637
#NI11

Lawn mower diagram

Lawn mower grass bag frame (replaces 647-04271, 747-05226)

Part #647-04271-0637

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Fuel Cap BS-594061
#NI10

Lawn mower diagram

Fuel cap

Part #BS-594061

Replaced by #84004416

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Manufacturer substitution
This part replaces BS-594061. Substitute parts can look different from the original.
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Lawn & Garden Equipment Belt 954-04260
#NI02

Lawn mower diagram

Lawn & garden equipment belt

Part #954-04260

Replaced by #490-501-Y005

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Manufacturer substitution
This part replaces 954-04260. Substitute parts can look different from the original.
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Lawn Mower Grass Bag 664P05322
#NI12

Lawn mower diagram

Lawn mower grass bag

Part #664P05322

Replaced by #664P05322A

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Manufacturer substitution
This part replaces 664P05322. Substitute parts can look different from the original.
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Lawn Mower Wheel (replaces 634-04630) 634-05062
#NI17

Lawn mower diagram

Lawn mower wheel (replaces 634-04630)

Part #634-05062

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Lawn Mower 21-in Deck Xtreme Mulching Blade 942-0741-X
#NI04

Lawn mower diagram

Lawn mower 21-in deck xtreme mulching blade

Part #942-0741-X

Replaced by #742P0741-X

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Manufacturer substitution
This part replaces 942-0741-X. Substitute parts can look different from the original.
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$22.02 | 
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Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

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Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

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Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

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How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Read more
Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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Top questions about Sears and Sears PartsDirect

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